The accuracy of the test results of the high and low temperature impact test chambers is related to the operator's operation process and the daily management of the equipment. If the management of the high and low temperature impact test chambers is not standardized, it will lead to high and low temperature impact. The performance of the test chamber has decreased, resulting in errors in the test results. So what are the specifications and matters needing attention in the high and low temperature impact test chamber?
1. The working chamber of the high and low temperature impact test chamber should be provided with an observation window and a lighting device, so that the operator can observe the sample in the box at any time during the test;
2. The heat and cooling capacity of the heating and cooling device should not be directly radiated on the sample to ensure the reliability of the test results;
3. The refrigeration system should not have air leakage, water leakage or oil leakage defects;
4, high and low temperature impact test box should be provided with test holes to facilitate user leads;
5. There should be a sample holder for placing or hanging test samples in the test chamber. The sample holder should have sufficient high temperature and low temperature resistance;
6. The inner wall of the test chamber should be made of materials that are resistant to heat and oxidation and have a certain mechanical strength. There should be no pollution sources that affect the test;
7. The door should be well sealed, and the sealing strip should have good resistance to high temperature aging and low temperature hardening;
8. Appearance coating should be smooth and even in color, and there should be no exposed bottom, blistering, layering or scratching;
9. The insulation material should have high temperature resistance and flame retardant properties. The thickness of the insulation layer should be high enough to ensure that the temperature of the externally accessible parts of the high and low temperature impact test chamber is not higher than 50 °C in the high temperature test, and not in the low temperature test and the ambient temperature is 15 ° C ~ 35 ° C, and the relative humidity is ≤ 85%. Condensation will occur.
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